Did I make a mistake?

I was in a relationship for 6 years (majority was long distance). In the beginning of the relationship if something bothered me I would let it go because I didn’t want to cause an argument. I started to get over that and would say when things bothered me but I feel like it was too late. He was so used to me letting things go that it was strange I was standing up for myself. Anyways, time passes and I start to feel like I’m not completely comfortable with him. I feel like I couldn’t be my quirky self because he’d make a comment or something. I was doubting the relationship for a long time (about a year) before I decided to end it. It’s been a few months since it ended, and I feel like I made a mistake because he wasn’t really a bad guy and I’m worried I made a mistake. Also I forgot to mention he wasn’t very affectionate throughout the relationship, and I feel like that was really missing. :( I don’t know what to do. Should I try to get back with him and work things out or just take time for myself? Has anyone else been in this situation?